More pee thoughts: we provide a cat litter pan for each couple. I line the pan with newspapers (the only thing the Washington Post is good for IMO) and then I put a thick layer of hay on top of the papers. The buns hop in, chew hay and pee all at the same time (efficient!) They still have a few accidents here and there, but most of it goes into the hay box, which I change every other day or so.